1. The problem statement, all variables and given/known data If a beam with square cross-section and very low density is placed in water, it will turn one pair of its long opposite faces horizontal. This orientation,however, becomes unstable as we increase its density. Find the critical density when this transition occurs. The density of water is ρ v = 1000 kg/m3 . 2. Relevant equations Lacking any idea,do not know how to start. 3. The attempt at a solution I did not understand the question.Could someone clarify it and tell me the relevant equations.